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dc.contributor.author
Araújo, Ricardo
dc.contributor.author
David, Romain
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Benoit, Julien
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Lungmus, Jacqueline K.
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Stoessel, Alexander
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Barrett, Paul M.
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Maisano, Jessica A.
dc.contributor.author
Ekdale, Eric
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Orliac, Maëva
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Luo, Zhe Xi
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Martinelli, Agustín Guillermo
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Hoffman, Eva A.
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Sidor, Christian A.
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Martins, Rui M. S.
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Spoor, Fred
dc.contributor.author
Angielczyk, Kenneth D.
dc.date.available
2023-11-07T12:53:18Z
dc.date.issued
2022-07
dc.identifier.citation
Araújo, Ricardo; David, Romain; Benoit, Julien; Lungmus, Jacqueline K.; Stoessel, Alexander; et al.; Inner ear biomechanics reveals a Late Triassic origin for mammalian endothermy; Nature Publishing Group; Nature; 607; 7920; 7-2022; 726-731
dc.identifier.issn
0028-0836
dc.identifier.uri
http://hdl.handle.net/11336/217270
dc.description.abstract
Endothermy underpins the ecological dominance of mammals and birds in diverse environmental settings1,2. However, it is unclear when this crucial feature emerged during mammalian evolutionary history, as most of the fossil evidence is ambiguous3–17. Here we show that this key evolutionary transition can be investigated using the morphology of the endolymph-filled semicircular ducts of the inner ear, which monitor head rotations and are essential for motor coordination, navigation and spatial awareness18–22. Increased body temperatures during the ectotherm–endotherm transition of mammal ancestors would decrease endolymph viscosity, negatively affecting semicircular duct biomechanics23,24, while simultaneously increasing behavioural activity25,26 probably required improved performance27. Morphological changes to the membranous ducts and enclosing bony canals would have been necessary to maintain optimal functionality during this transition. To track these morphofunctional changes in 56 extinct synapsid species, we developed the thermo-motility index, a proxy based on bony canal morphology. The results suggest that endothermy evolved abruptly during the Late Triassic period in Mammaliamorpha, correlated with a sharp increase in body temperature (5–9 °C) and an expansion of aerobic and anaerobic capacities. Contrary to previous suggestions3–14, all stem mammaliamorphs were most probably ectotherms. Endothermy, as a crucial physiological characteristic, joins other distinctive mammalian features that arose during this period of climatic instability28.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Publishing Group
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
TRIASSIC
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ENDOTHERMY
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CYNODONTIA
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INNER EAR
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Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Inner ear biomechanics reveals a Late Triassic origin for mammalian endothermy
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-06T15:30:43Z
dc.journal.volume
607
dc.journal.number
7920
dc.journal.pagination
726-731
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Araújo, Ricardo. Instituto Superior Tecnico; Portugal
dc.description.fil
Fil: David, Romain. Natural History Museum; Reino Unido. Institut Max Planck for Evolutionary Anthropology; Alemania
dc.description.fil
Fil: Benoit, Julien. University of the Witwatersrand; Sudáfrica
dc.description.fil
Fil: Lungmus, Jacqueline K.. National Museum of Natural History; Estados Unidos
dc.description.fil
Fil: Stoessel, Alexander. Universitat Jena; Alemania. Institut Max Planck for Evolutionary Anthropology; Alemania
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Fil: Barrett, Paul M.. Natural History Museum; Reino Unido
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Fil: Maisano, Jessica A.. No especifíca;
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Fil: Ekdale, Eric. San Diego State University; Estados Unidos
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Fil: Orliac, Maëva. Université Montpellier II; Francia
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Fil: Luo, Zhe Xi. University of Chicago; Estados Unidos
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Fil: Martinelli, Agustín Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
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Fil: Hoffman, Eva A.. American Museum of Natural History; Estados Unidos
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Fil: Sidor, Christian A.. University of Washington; Estados Unidos
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Fil: Martins, Rui M. S.. Instituto Superior Tecnico; Portugal
dc.description.fil
Fil: Spoor, Fred. Natural History Museum; Reino Unido. Institut Max Planck for Evolutionary Anthropology; Alemania. Colegio Universitario de Londres; Reino Unido
dc.description.fil
Fil: Angielczyk, Kenneth D.. No especifíca;
dc.journal.title
Nature
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/s41586-022-04963-z
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